shovel: filter on fields that aren't indexed

[ryandotsmith]

The following input's filter will not be applied because it has no column specific

"inputs": [{
  "indexed": false,
  "name": "foo",
  "type": "bytes32",
  "filter_op": "contains",
  "filter_arg": ["deadbeef"]
}

This is not ideal. I'd like to filter on a field regardless of whether I'm saving it to the db.

[holic]

another use case

"block": [
  { "name": "chain_id", "column": "chain_id" },
  { "name": "log_addr", "column": "log_addr", "filter_op": "contains", "filter_arg": ["deadbeef"]},
  { "name": "block_time", "column": "block_time" }
],

since I already know the address I am filtering on, I don't need to store it in the DB